EVENT 524 Girls Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Hannah WILLIS | 10 | South Lincs | 7:40.98 |
| 2 | 3 | Harriot RICHMOND | 11 | Leic Sharks | 7:11.41 |
| 3 | 5 | Naomi FORD | 11 | Lincoln Vulc | 6:49.85 |
| 4 | 7 | Laura CLARK | 11 | Leic Sharks | 6:43.33 |
| 5 | 6 | Laura LUTHI | 10 | Co Leicester | 6:49.20 |
| 6 | 4 | Eloise RAINE | 11 | Co Leicester | 6:50.76 |
| 7 | 2 | Lily PEACOCK | 12 | Leic Sharks | 7:24.55 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 9 | Macy NORTON | 11 | Co Leicester | 6:40.08 |
| 2 | 11 | Olivia BEASANT | 13 | Rushden | 6:34.48 |
| 3 | 13 | Amy WOODS | 11 | Lincoln Vulc | 6:30.74 |
| 4 | 15 | Keanna KOWAL | 11 | Leic Sharks | 6:24.44 |
| 5 | 14 | Lucy RUSSELL | 11 | Co Leicester | 6:25.53 |
| 6 | 12 | Cailin HANCOCK | 11 | Co Leicester | 6:31.10 |
| 7 | 10 | Ella MARTINDALE | 13 | Shrewsbury | 6:40.00 |
| 8 | 8 | Grace MOORLEY | 10 | Leic Sharks | 6:40.88 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 17 | Hannah LINES | 11 | Leic Sharks | 6:16.50 |
| 2 | 19 | Zara GRAHAM | 12 | Shrewsbury | 6:11.78 |
| 3 | 21 | Yasmine SHEFFIELD | 11 | Leic Sharks | 6:08.97 |
| 4 | 23 | Emily CROOKES | 11 | Lincoln Vulc | 6:06.38 |
| 5 | 22 | Molly DENTON | 10 | Leic Sharks | 6:08.64 |
| 6 | 20 | Jessie SPOONER | 13 | Deepings | 6:09.77 |
| 7 | 18 | Mine AVUL | 13 | Leicester Ne | 6:15.16 |
| 8 | 16 | Grace MAYES | 12 | Leicester Ne | 6:22.37 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 25 | Evie RICHARDS | 12 | Co Leicester | 5:59.67 |
| 2 | 27 | Emily JOHNSTONE | 11 | Co Leicester | 5:55.46 |
| 3 | 29 | Rebecca HADLEY | 11 | Co Leicester | 5:45.13 |
| 4 | 31 | Eleanor CAPELL | 13 | Loughborough | 5:41.36 |
| 5 | 30 | Rosemary HARVEY | 14 | Deepings | 5:43.82 |
| 6 | 28 | Emily WHEATLEY | 12 | Co Leicester | 5:46.90 |
| 7 | 26 | Megan SPEIRS | 11 | Lincoln Vulc | 5:55.59 |
| 8 | 24 | Sophie BENNION | 12 | Coalville | 6:01.02 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 33 | Victoria MALONE | 15 | Leicester Ne | 5:37.78 |
| 2 | 35 | Millie RANDLE | 12 | Leic Sharks | 5:33.60 |
| 3 | 37 | Sophie SCOTT | 15 | Shrewsbury | 5:32.70 |
| 4 | 39 | Katie WEST | 14 | Loughborough | 5:27.71 |
| 5 | 38 | Maddison GREGORY | 13 | Loughborough | 5:32.10 |
| 6 | 36 | Katie LANCASTER | 12 | Lincoln Vulc | 5:33.07 |
| 7 | 34 | Olivia SNOOK | 12 | Rushden | 5:35.53 |
| 8 | 32 | Ellie BUNKER | 12 | Sutton | 5:41.20 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 41 | Alexandra COOPER | 13 | Deepings | 5:25.17 |
| 2 | 43 | Jessica PERRY | 14 | Hinckley | 5:23.82 |
| 3 | 45 | Ianthe BRITTAIN | 12 | Co Leicester | 5:23.61 |
| 4 | 47 | Abigail LISTON | 18 | Leic Sharks | 5:19.41 |
| 5 | 46 | Mia WILLIAMS | 12 | Braunstone | 5:19.56 |
| 6 | 44 | Alexandra WEST | 15 | Loughborough | 5:23.71 |
| 7 | 42 | Sofia BREEZE | 15 | Grantham | 5:24.97 |
| 8 | 40 | Harriette ROWDEN JONES | 11 | Louth | 5:26.46 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 49 | Madeleine BARNES | 13 | Grantham | 5:12.20 |
| 2 | 51 | Abbi WHITE | 13 | Leic Sharks | 5:10.30 |
| 3 | 53 | Maisie AUBREY | 13 | Lincoln Vulc | 5:07.21 |
| 4 | 55 | Kate GRINDLEY | 19 | Shrewsbury | 4:58.60 |
| 5 | 54 | Megan POTTS | 16 | Shrewsbury | 5:06.50 |
| 6 | 52 | Katie ROSCOE | 12 | Louth | 5:09.82 |
| 7 | 50 | Lara HAWKES | 12 | Grantham | 5:10.74 |
| 8 | 48 | Connie-May ROPER | 15 | Leic Sharks | 5:17.40 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 57 | Millie PRUDDEN | 15 | Boston | 4:58.08 |
| 2 | 59 | Jade APPS | 16 | Lincoln Vulc | 4:56.08 |
| 3 | 61 | Yasmin FLINT | 14 | Leic Sharks | 4:54.80 |
| 4 | 63 | Tia VYAS | 14 | Co Leicester | 4:54.54 |
| 5 | 62 | Zoe LOCK | 14 | Co Leicester | 4:54.75 |
| 6 | 60 | Ellie KERROD | 12 | Co Leicester | 4:55.20 |
| 7 | 58 | Bethany WILDE | 16 | Deepings | 4:57.38 |
| 8 | 56 | Gemma BAKER | 16 | South Lincs | 4:58.22 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 65 | Elissa GRATTON | 15 | Lincoln Vulc | 4:53.63 |
| 2 | 67 | Abbie SCOTT | 13 | Nova Cent'n | 4:53.36 |
| 3 | 69 | Sarah WHITE | 13 | Co Leicester | 4:52.50 |
| 4 | 71 | Lauren WOODS | 13 | Lincoln Vulc | 4:51.22 |
| 5 | 70 | Courtney SMITH | 15 | Co Leicester | 4:51.30 |
| 6 | 68 | Isobel SCHOFIELD | 16 | Grantham | 4:52.86 |
| 7 | 66 | Constance FARMER | 14 | Co Leicester | 4:53.44 |
| 8 | 64 | Abigail KIRKUP | 12 | Co Leicester | 4:54.00 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 73 | Chloe BALDRY | 15 | Boston | 4:47.78 |
| 2 | 75 | Sophie BUNKER | 15 | Sutton | 4:47.10 |
| 3 | 77 | Chloe PEACH | 15 | Nova Cent'n | 4:41.01 |
| 4 | 79 | Lucy FAIRBANKS | 17 | Shrewsbury | 4:33.96 |
| 5 | 78 | Lily MILLER | 16 | Louth | 4:38.74 |
| 6 | 76 | Rachel SULLIVAN | 17 | Daventry | 4:44.80 |
| 7 | 74 | Sarah CHAPMAN | 15 | Leamington | 4:47.58 |
| 8 | 72 | Ellen DUDLEY | 15 | Nova Cent'n | 4:51.21 |